November 10, 2011 1:02 PM
Greetings NC RTN users:
We are pleased to inform you of the following two NC CORS/RTN announcements, NCGS is:
- Upgrading the RTN’s software which will provide:
A web-based tool for a user to check the status of both the network and his/her device’s status on the network
During this upgrade and migration period, we will operate both the existing system and the new system. Our plan is to operate both systems until the end of the year in order to provide sufficient time for each RTN user to:
1. Update the RTN access information on his/her device
2. Register onto the new web-access system
3. Test drive the new system
The new RTN system will be referenced to the most recent National Geodetic Survey (NGS) adjustment of NAD 83, NAD 83(2011) (http://www.ngs.noaa.gov/web/surveys/NA2011/NA2011_Project.shtml), which is based on the recently published multi-year CORS solution (http://www.ngs.noaa.gov/CORS/coord_info/myear_FAQ.shtml).
Note: Although NGS has published the new multi-year CORS solution, NGS is still in the process of adjusting the passive marks that have published NAD 83(NSRS2007) positions.
Note: NGS will produce a new geoid model, which will be released in early 2012 and consequently named GEOID12, to be used with NAD 83(2011). For more info on the new geoid, please read National Adjustment of 2011 (NA2011) FAQ #20 (http://www.ngs.noaa.gov/web/surveys/NA2011/NA2011_FAQ.shtml).
Until the new geoid is released, we recommend localizing to NAVD 88 bench marks when using NAD 83(2011) ellipsoid heights with the current geoid, GEOID09, because GEOID09 was developed to work with CORS96/NAD 83(NSRS2007).
We expect to complete beta testing of the new RTN system by the end of November. Once beta testing has been completed, we will provide you with the following information:
1. The new RTN access information
2. Directions for registering onto the new web-access system
Gary W. Thompson, Chief